The structure of the carbon foam derived from meophase coal-tar pitch

Abstract

In this study, the main purpose is developing isotropic carbon foam for thermal management application. Mesophase coal-tar pitch (LQBP) was used to be raw materials to forming carbon foam; this mesophase coal-tar pitch was provided by China Steel Chemical Corporation. The mesophase coal-tar pitch contains ash about 0.1% and fixed carbon 56%. The soft-point point of the mesophase coal-tar pitch is about 91 oC. In the job, the one step method to forming carbon foam was used and this method would fabricate carbon foam more effective, comparing traditional fabrication process. After one step method to forming carbon foam, a series carbonization and graphitization of foam would be done. The final graphitization temperature was up to 2500 oC. After theses carbon foam were treated at 2500 oC, the density of Ithecarbon foam is 0.677 g/c.c, the degree of graphitization for the carbon foam is about 92% and compressive stress for the carbon foam is 3.24 Mpa, respectively.